Winter Work: Deep Ripping, Weed Control & Compost

Winter is a critical time for Central Valley growers. While orchards may look dormant, this is when the most important groundwork happens—literally. From deep ripping hardpan soils to applying pre-emergence herbicides and building long-term soil health with compost, the decisions you make now directly impact next season's yields. Here's what we're focused on this winter at Custom Farm Services.

Deep Ripping

One of the most impactful winter operations we perform is deep ripping with our D8R Caterpillar. In the Central Valley, a compacted hardpan layer often sits 18 to 36 inches below the surface, restricting root penetration, limiting water infiltration, and reducing overall tree vigor. Our deep ripping operations reach depths of up to 65 inches, shattering that hardpan and giving roots the freedom to grow deep and strong.

Deep ripping is especially important when preparing ground for new orchard plantings, but established orchards benefit too. By breaking through compacted layers, we improve:

• Root penetration — Roots can access deeper moisture and nutrients, increasing drought resilience
• Water infiltration — Irrigation water moves through the profile more efficiently, reducing runoff and standing water
• Soil aeration — Oxygen reaches deeper soil layers, promoting beneficial microbial activity
• Drainage — Excess water drains away rather than pooling at the hardpan layer, reducing root rot risk
• Long-term yield improvement — Healthier root systems translate directly to better production over the life of the orchard

"Deep ripping is the single best investment a grower can make before planting a new orchard. The benefits compound over the entire 20 to 25-year life of the trees."

Winter is the ideal window for deep ripping because the soil has some moisture content from early rains, making it easier to shatter rather than just push around. But it's not so wet that heavy equipment causes excess compaction. Timing is everything, and our crew monitors conditions closely to hit that sweet spot.

Weeds

Winter weed control is all about timing and preparation. The most effective strategy for Central Valley orchards is applying pre-emergence herbicides before winter rains push weed seeds into germination. Once the first significant rains arrive, the clock starts ticking.

Pre-emergence herbicides work by creating a chemical barrier in the top layer of soil that prevents weed seedlings from establishing. The key is getting your application down before the germination window opens—typically late November through early December in our region. Miss that window, and you're chasing weeds with post-emergence treatments all spring, which costs more and provides less consistent control.

We work with growers and their PCAs to coordinate herbicide applications with our ground preparation services. If you're doing deep ripping or spreading, it makes sense to sequence these operations so the herbicide layer isn't disrupted. Planning ahead saves time, money, and headaches down the road.

A well-timed pre-emergence application in December can save growers thousands of dollars in spring weed management costs—and keep orchards cleaner for harvest preparation.

Compost

Compost is a long game, and the data backs it up. A four-year nitrogen study conducted in the Central Valley tracked the effects of consistent compost applications on almond orchards. The findings were compelling: orchards receiving annual compost applications saw an effective nitrogen contribution of approximately 75 lbs per acre per year from the compost alone, significantly reducing the need for synthetic fertilizer inputs.

But nitrogen is just part of the story. Compost builds organic matter in the soil, which improves water-holding capacity, supports beneficial microorganisms, and creates a more resilient growing environment overall. In a region where water is increasingly precious and expensive, anything that helps your soil hold onto moisture longer is worth serious consideration.

Our spreading crews handle compost applications across Merced, Stanislaus, San Joaquin, and Madera counties. We work with several regional compost suppliers to ensure consistent quality and competitive pricing. Winter is an excellent time to apply compost—the material has several months to begin breaking down and integrating with the native soil before the growing season kicks off in spring.

• 75 lbs/acre/year of effective nitrogen from consistent compost application
• Improved water retention — critical in California's drought-prone climate
• Enhanced microbial activity — healthier soil biology means healthier trees
• Reduced synthetic fertilizer costs — compost offsets a significant portion of N requirements

If you're planning orchard development, redevelopment, or simply looking to improve your soil health program, winter is the time to act. Give us a call to discuss how deep ripping, weed management, and compost applications can fit into your operation's plan for the coming season.