Hello all, Very new here and to gardening. Love the forum. I have had some issues with yellowing leaves on cucs and end rot on squash and through reading many poasts have determined that my issue is with lack of nitrogen in the soil as I have used straw as mulch which I understand takes away nitrogen as it decomposes. What would be the best way to add nitrogen into the soil quickly and organically? Consequently, I have tomatoes in the same raised bed and they are doing GREAT! Does that makes sense? Any help would be great.