Friday, July 20, 2007

Almonds splitting! Dry weather helps!!


In case you were wondering about that tall white structure, it is our bountiful ground water well. We don't really use it because we are in good water district (Turlock Irrigation District), but it could come in handy if California faces a long, drawn-out drought. Always good to have multiple water sources.


You hardly see many weeds on the ground. That's because Carpenter ranch is micro-sprinkler irrigated.



Saturday, July 7, 2007

It's not exclusive to Ants and Acacia trees..

You might have heard it. Ants and Acacia trees have a mutually beneficial agreement. Acacia tree provides its sugar rich sap and shelter to ants. Ants, in turn, protect acacia tree from grasshoppers and weeds.

In fact, every plant and tree on the planet forms symbiotic relationship with soil microbes for its survival.

Plants grow by trading things they produce from photosynthesis (plant sugars) for things excreted by the soil microbes (such as nitrogen, phosphorus, etc.).

In the process of photosynthesis, light energy from the sun is converted to chemical energy held within the bonds of the molecules of sugars produced. Most of the nutrients for plant growth come from the soil microbes which trade these nutrients for the carbon-based sugars produced by the plant’s photosynthesis. The plant exudes these sugars from its roots and attracts the soil biota. This all takes place in a 2 millimeter area around the roots (called the rhizosphere).

This is perfect. Plants need the nutrients like nitrogen and the soil biota need the carbon-based sugars and the chemical energy.
It is a trading economy that has been in place since the beginning of life on Earth.

Soil microbes include various kinds of bacteria, fungi and protozoa. The big microbes (like protozoa) eat the little ones (bacteria). This makes the nutrients in the bacteria’s body (most importantly, Nitrogen) available to plants through the feces of the bigger microbes.

All Carbon-based life forms generally have a ratio of Carbon to Nitrogen of around 25 to 1, but bacteria are very Nitrogen-rich and have a Carbon to Nitrogen ratio of around 5 to 1. So, a big microbe (maybe a protozoa) needs to eat 5 bacteria to get 25 atoms of Carbon, but if it does it will get 5 atoms of Nitrogen. This is 4 more than it needs, so the extra Nitrogen is excreted and becomes available to plant roots. Luckily, the plants have been clever enough to attract the microbes to the rhizospere by offering all those sugars, so it is easy to get the Nitrogen.


Monday, July 2, 2007

At work in almond orchard!!

In the pictures, you can see Prof. Roger Duncan, who is considered to be the most prolific researcher and the highest authority in matters of growing almonds. He always comes down to help a new almond grower (me!) and never takes any fee. Thank you, Roger!





Tuesday, June 26, 2007

Gophers, Squirrels and Rabbits? Oh, my!!

So, I was taking a course on orchard management. One important aspect of it was "vertebrate pest management." 

Orchards provide food and shelter for small animals that can cause significant damage:
  • Squirrels feed on fruit and on tree bark and shoots, which can stunt growth or even kill trees. 
  • Rabbits will chew on flexible irrigation lines and emitters. 
  • Gophers will dig holes through the soil surface, thereby channeling surface irrigation water to undesired areas. 
  • Food safety also becomes an issue if pest residues come into contact with the fruit. 
The major vertebrate pests apparently are pocket gophers, California ground squirrel, and black-tailed jackrabbit. 

Management programs for vertebrate pests involve 4 basic steps:
  1. Correctly identify the pest species using damage signs, burrows or habitat, tracks, feces, etc.
  2. Modify the habitat to make the area less favorable to the pest species.
  3. Implement appropriate control. Includes baiting, fencing, shooting or trapping.  Use due consideration for the environment and non-target species.
  4. Establish a monitoring system so as to detect re-infestation.
It is much easier to manage vertebrate pests by implementing controls on the orchard's perimeter versus inside the orchard.

I am so glad we have a strong fence around our ranch. I really hope we don't have to deal with these small creatures.

blacktailed jackrabbit:

pocket gopher:

Monday, June 25, 2007

Pre-harvest pooja (prayer)!





Peach harvest!

More than 90% of the US cling-stone peach production and 70% of the freestone peach production occur in California. Our ranch is all cling-stone peaches. Freestone peaches are grown primarily for fresh market and cling peaches mainly for canning.

The last pic you see are nectarines. The previous ranch owner grew a small patch containing various kinds of stone fruit trees for fun, I guess. This tree is one of them.
 




Sunday, June 24, 2007

Pleasant surprise at peach orchard!

Who knew? Perhaps because of winter, I didn't notice that the ranch's previous owner was growing vines as a privacy hedge(?) behind the mobile house. Well, we could always use organic table grapes, right?