Philipwonel said: ... ALSO!!!! There are certain spots in my garden where certain veges grow better ???? I dont know why maybe you do ? Garden is approx. 20× 35 feet with 150 feet of drip line. ....
Well, sun is a huge factor. Maybe some plants need afternoon shade, or are actually cool weather plants.
Most veggies need "full sun", but maybe "full sun" in Fresno California is too much for some.
If you haven't tilled deeply in decades, maybe your soil varies from spot to spot. If you fertilize one row at a time, maybe some areas have too much of some nutrients (N is particularly toxic when in excess) or not enough (heavy feeding crops can suck the fertility right out of some soils).
You might try wheelbarrow-ing some soil from some spots to others, to average the soil out and make a level surface. Then get a soil test.
But my answer to most gardening questions is "Drainage!" After a rain, do you have patches of soil that stay soggy longer than other patches?
Do low spots flood or hold puddles more than briefly? A few inches above or below grade could make a big difference if your drainage is marginal. If soggy soil is an issue, you could mound up soil in the rows, pulling soil from the walkways between rows, to make slightly raised beds.
(But I think you said "drip irrigation", which hints at
dry soil, so don't park your roots zones any farther above the water table than necessary. If the drip irrigation might be variable, consider replacing drippers in the bad spots, or start buying pressure-compensating drippers.)
Or, if your soil is sandy (excessive drainage, insufficient water-holding-capacity), patches with better soil would have a big beneficial effect on crops. Add even more compost than you do now! Mulch heavily, because that's future compost and today's evaporation-reduction. Can you get your hands on large amounts of less-sandy soil, to amend your garden?
