Calag Archive

It's economically sound to keep at least some trees on rural subdivision land.

Container plant water use has been calculated to help nurseries improve water management.

New cultivars could increase tall fescue's popularity in central coastal California climates.

At 59°F, CUF 101 alfalfa lost its resistance to blue alfalfa aphid in laboratory experiments.

Rapid buildup and dispersal of the aphid are cause for concern by growers.

Multicut berseem clover outyielded ryegrass and had a high nitrogen-fixing ability in four years of field trials.

Not available – first paragraph follows: Subsurface drainage problems in farming areas historically have been dealt with by installing systems to collect and convey drainage water to a disposal site. While these systems remove drainage water as it is generated, no source reduction is considered. The saline and toxic nature of drainage water in the San Joaquin Valley, however, precludes this traditional disposal method.

Not available – first paragraph follows: A primary goal of good irrigation management is to minimize deep percolation of water (infiltration exceeding the irrigation requirement) while replenishing soil water in the plant root zone along the entire length of the field. Deep percolation losses depend directly on irrigation system performance, which, in turn, depends mainly on how evenly water infiltrates across the field. Furrow and border irrigation, the primary methods used in the drainage problem area of the San Joaquin Valley's West Side, usually have relatively low uniformities because of (1) unequal infiltration opportunity times for water across the field, and (2) spatial variability in soil water transport properties. Properly designed and managed sprinkler and drip irrigation systems, on the other hand, commonly achieve a better uniformity, since the amounts infiltrated depend primarily on application rates and system design rather than on soil infiltration properties.