Declining values for farm equipment and land , the collateral against which farmers borrow to get through the harvest season, is going to force many lenders to tighten or deny credit this spring.
这句话的主语没找到,请牛人帮忙.如果可以的话,请再帮忙翻译一下下,谢谢!!

declining value 是主语，划线部分为插入语

大意是：农业设备和土地（农民们依靠其作为担保取得借款以度过收割的季节）的贬值将使得许多贷款人在今春紧缩或拒绝提供信贷。

Subject is "declining values for farm equipment and land". You can break it down to two parts:

1. Declining values for farm equipment and land are going to force many

lenders to tighten or deny credit this spring.
2. Farmers use farm equipments and land as collaterals to borrow to get

through the harvest season.